题干

用图所示装置进行下列实验:将①中溶液滴入②中,预测的现象与实际相符的是 (   )

选项

①中物质

②中物质

预测②中的现象

A

稀硫酸

硝酸亚铁溶液

无明显现象

B

浓硝酸

用砂纸打磨过的铝条

产生红棕色气体

C

氯化铝溶液

浓氢氧化钠溶液

立即产生大量白色沉淀

D

草酸溶液

高锰酸钾酸性溶液

溶液逐渐褪色

A:A 

B:B 

C:C 

D:D

上一题 下一题 0.0难度 选择题 更新时间:2017-03-15 03:42:09

答案(点此获取答案解析)

D

同类题5

阅读理解

    In ancient Egypt, a shopkeeper discovered that he could attract customers to his shop simply by making changes to its environment. Modern businesses have been following his lead, with more tactics(策略).

    One tactic involves where to display the goods. Foe example, stores place fruits and vegetables in the first section. They know that customers who buy the healthy food first will feel happy so that they will buy more junk food(垃圾食品)later in their trip. In department stores, section is generally next to the women's cosmetics(化妆品) section:while the shop assistant is going back to find the right size shoe, bored customers are likely to wander over cosmetics they might want to try later.

    Besides, businesses seek to appeal to customers' senses. Stores notice that the smell of baked goods encourages shopping, they make their own bread each morning and then fan the bread smell into the store throughout the day. Music sells goods, too. Researchers in Britain found that when French music was played, sales of French wine went up.

    When it comes to the selling of houses, businesses also use highly rewarding tactics. They find that customers make decision in the first few second upon walking in the door, and turn it into a business opportunity. A California builder designed the structure of its houses smartly. When entering the house, the customer would see the Pacific Ocean through the windows, and then the poll through an open stairway leading to the lower level. The instant view of water on both levels helped sell these $10 million houses.